*{margin: 0;
padding: 0;}
.container{
    background-color: aqua;
    position:fixed;
    width: 100%;
    height: 70px;
    bottom: 0;
    display: flex;
    align-items: center;
}
.sub{
    flex: 1;
    text-align:center;
}
.sub img{
    height: 30px;
}